<template>
	<div>
		<!-- 面包屑导航区域 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>权限管理</el-breadcrumb-item>
			<el-breadcrumb-item>角色列表</el-breadcrumb-item>
		</el-breadcrumb>
		<!-- 卡片视图区域 -->
		<el-card>
			<!-- 添加角色按钮 -->
			<el-row>
				<el-col>
					<el-button type="primary" @click="addRolesDialogVisible=true">添加角色</el-button>
				</el-col>
			</el-row>
			<!-- 角色列表区域 -->
			<el-table :data="rolelist" border stripe>
				<!-- 展开列 -->
				<el-table-column type="expand">
					<template slot-scope="scope">
						<el-row :class="['bdbottom',i1===0 ? 'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
							<!-- 渲染一级权限 -->
							<el-col :span="5">
								<el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
								<i class="el-icon-caret-right"></i>
							</el-col>
							<!-- 渲染二级和三级权限 -->
							<el-col :span="19">
								<!-- 通过for循环嵌套渲染二级权限 -->
								<el-row :class="[i2===0 ? '':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
									<el-col :span="6">
										<el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
										<i class="el-icon-caret-right"></i>
									</el-col>
									<el-col :span="18">
										<el-tag type="warning " v-for="(item3,i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
											{{item3.authName}}
										</el-tag>
										
									</el-col>
								</el-row>
							</el-col>
						</el-row>
					</template>
				</el-table-column>
				<!-- 索引列 -->
				<el-table-column type="index" label="#"></el-table-column>
				<el-table-column label="角色名称" prop="roleName"></el-table-column>
				<el-table-column label="角色描述" prop="roleDesc"></el-table-column>
				<el-table-column label="操作" width="300px">
					<template slot-scope="scope">
						<el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
						<el-button size="mini" type="danger" icon="el-icon-delete" @click="removeUserById(scope.row.id)">删除</el-button>
						<el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
					</template>
				</el-table-column>
			</el-table>
		</el-card>
		<!-- 添加角色的对话框 -->
		<el-dialog title="添加角色" :visible.sync="addRolesDialogVisible" width="50%" @close="addDialogClosed">
			<!-- 内容主体区域-->
			<el-form :model="addRolesForm" :rules="addFormRules" ref="addFormRef" label-width="110px">
				<el-form-item label="角色名称" prop="roleName">
					<el-input v-model="addRolesForm.roleName"></el-input>
				</el-form-item>
				<el-form-item label="角色描述" prop="roleDesc">
					<el-input v-model="addRolesForm.roleDesc"></el-input>
				</el-form-item>
			</el-form>
			<!-- 底部区域-->
			<span slot="footer" class="dialog-footer">
				<el-button @click="addRolesDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="addRoles">确 定</el-button>
			</span>
		</el-dialog>
		<!-- 修改角色的对话框 -->
		<el-dialog title="修改角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
			<!-- 内容主体区域-->
			<el-form :model="editRolesForm" :rules="editRolesFormRules" ref="editFormRef" label-width="70px">
				<el-form-item label="角色名称">
					<el-input v-model="editRolesForm.roleName" disabled></el-input>
				</el-form-item>
				<el-form-item label="角色描述" prop="roleDesc">
					<el-input v-model="editRolesForm.roleDesc"></el-input>
				</el-form-item>

			</el-form>
			<span slot="footer" class="dialog-footer">
				<el-button @click="editDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="editRolesInfo">确 定</el-button>
			</span>
		</el-dialog>
		<!-- 分配权限的对话框 -->
		<el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
		  <!-- 树形空间-->
		  <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" 
		  default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
		  <span slot="footer" class="dialog-footer">
		    <el-button @click="setRightDialogVisible = false">取 消</el-button>
		    <el-button type="primary" @click="allotRights">确 定</el-button>
		  </span>
		</el-dialog>
	</div>
</template>

<script>
	export default {
		data() {
			return {
				//所有角色列表数据
				rolelist: [],
				//控制添加角色对话框的显示与隐藏
				addRolesDialogVisible: false,
				//添加角色的表单数据
				addRolesForm: {
					roleName: '',
					roleDesc: ''
				},
				//添加表单的验证规则对象
				addFormRules: {
					roleName: [{
						required: true,
						message: '请输入角色名',
						trigger: 'blur'
					}]
				},
				//控制修改角色对话框的显示与隐藏
				editDialogVisible: false,
				//查询到的角色信息对象
				editRolesForm: {},
				//修改表单的验证规则对象
				editRolesFormRules: {
					roleName: [{
						required: true,
						message: '请输入角色名',
						trigger: 'blur'
					}],
				},
				//控制分配权限对话框的显示与隐藏
				setRightDialogVisible:false,
				//所有权限的数据
				rightslist:[],
				//树形控件的属性绑定对象
				treeProps:{
					label:'authName',
					children:'children'
				},
				//默认选中的节点Id值数组
				defKeys:[],
				//当前即将分配权限的角色id
				roleId:''
			}
		},
		created() {
			this.getRolesList()
		},
		methods: {
			//获取所有角色的列表
			async getRolesList() {
				const {
					data: res
				} = await this.$http.get('roles')
				if (res.meta.status !== 200) {
					return this.$message.error('获取角色列表失败')
				}
				this.rolelist = res.data
				console.log(this.rolelist)
			},
			//监听添加角色对话框的关闭事件
			addDialogClosed() {
				this.$refs.addFormRef.resetFields()
			},
			//点击按钮，添加新角色
			addRoles() {
				this.$refs.addFormRef.validate(async valid => {
					if (!valid) return
					//可以发起添加角色的网络请求
					const {
						data: res
					} = await this.$http.post('roles', this.addRolesForm)
					if (res.meta.status !== 201) {
						this.$message.error('添加角色失败！')
					}
					this.$message.success('添加角色成功!')
					//隐藏添加角色的对话框
					this.addRolesDialogVisible = false
					//重新获取角色列表数据
					this.getRolesList()
				})
			},
			//展示编辑角色的对话框
			async showEditDialog(id){
				//console.log(id)
				 const {data:res} = await this.$http.get('roles/'+id)
				 if(res.meta.status!==200){
					 return this.$message.error('查询角色信息失败')
				 }
				 this.editRolesForm=res.data
				this.editDialogVisible=true
			},
			//监听修改角色对话框的关闭事件
			editDialogClosed(){
				this.$refs.editFormRef.resetFields()
			},
			editRolesInfo(){
				this.$refs.editFormRef.validate (async valid=>{
					if(!valid)return
					//发起修改角色信息的数据请求
					const{data:res} = await this.$http.put('roles/'+this.editRolesForm.roleId,{
						roleName:this.editRolesForm.roleName,
						roleDesc:this.editRolesForm.roleDesc,
						
					})
					console.log(res)
					if(res.meta.status!==200){
						return this.$message.error('更新角色信息失败！')
					}
					//关闭对话框
					this.editDialogVisible=false
					//刷新数据列表
					this.getRolesList()
					//提示修改成功
					this.$message.success('更新角色信息成功！')
				})
			},
			//根据Id删除对应的角色信息
			async removeUserById( id){
				//弹框询问角色是否删除数据
				const confirmResult= await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
				          confirmButtonText: '确定',
				          cancelButtonText: '取消',
				          type: 'warning'
				        }).catch(err => err)
						
						//如果角色确认删除，则返回值为字符串 confirm
						//如果角色取消删除，则返回值为字符串 cancel
						if(confirmResult !== 'confirm'){
							return this.$message.info('已取消删除')
						}
						const {data:res} = await this.$http.delete('roles/'+id)
						
						if(res.meta.status!==200){
							return this.$message.error('删除角色失败！')
						}
						this.$message.success('删除角色成功!')
						this.getRolesList()
			},
			//根据Id删除对应的权限
			async removeRightById(role,rightId){
				//弹框提示用户是否要删除
				const confirmResult= await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
				          confirmButtonText: '确定',
				          cancelButtonText: '取消',
				          type: 'warning'
				        }).catch(err => err)
						if(confirmResult !== 'confirm'){
							return this.$message.info('已取消删除')
						}
						const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
						if(res.meta.status!==200){
							return this.$message.error('删除权限失败！')
						}
						
						role.children=res.data
			},
			//展示分配权限的对话框
			async showSetRightDialog(role){
				this.roleId=role.id
				//获取所有权限的数据
				const{data:res} = await this.$http.get('rights/tree')
				if(res.meta.status!==200){
					return this.$message.error('获取权限数据失败!')
				}
				//把获取到的权限数据保存到data中
				this.rightslist=res.data
				console.log(this.rightslist)
				//递归获取三级节点的Id
				this.getLeafKeys(role,this.defKeys)
				this.setRightDialogVisible=true
			},
			//通过递归的形式，获取角色下所有三级权限的id,并保存到defKeys数组中
			getLeafKeys(node,arr){
				//如果当前node 节点不包含children属性。则是三级节点
				if(!node.children){
					return arr.push(node.id)
				}
				node.children.forEach(item=>
				this.getLeafKeys(item,arr))
			},
			//监听分配权限对话框的事件
			setRightDialogClosed(){
				this.defKeys=[]
			},
			//点击为角色分配权限
			async allotRights(){
				const keys=[
					...this.$refs.treeRef.getCheckedKeys(),
					...this.$refs.treeRef.getHalfCheckedKeys()
				]
				const idStr=keys.join(',')
				const{data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
				if(res.meta.status!==200){
					return this.$message.error('分配权限失败!')
				}
				this.$message.success('分配权限成功!')
				this.getRolesList()
				this.setRightDialogVisible=false
		}
	},
}
</script>

<style Lang="less" scoped>
	.el-tag{
		margin: 7px;
	}
	.bdtop{
		border-top: 1px solid #eee;
	}
	.bdbottom{
		border-bottom: 1px solid #eee;
	}
	.vcenter{
		display: flex;
		align-items: center;
	}
</style>
